Md. Code, Pub. Safety § 12-611

(a) (1) Unless a certificate is renewed for a 3–year term as provided in this section, the certification expires on the date set by the State Fire Marshal. (2) The State Fire Marshal may determine that certificates issued under this subtitle shall expire on a staggered basis. (b) At least 45 days before a certificate expires, the State Fire Marshal shall mail to the certificate holder, at the last known address of the certificate holder: (1) a renewal application form; and (2) a notice that states: (i) the date on which the current certificate expires; (ii) that the State Fire Marshal must receive the renewal application at least 15 days before the certificate expiration date for the renewal to be issued and mailed before the certificate expires; (iii) the amount of the renewal fee; (iv) that an individual may not be issued a certificate under this subtitle until all outstanding obligations are satisfied with the State Fire Marshal; and (v) that the submission of a false statement in the renewal application or the submission of altered or false documents that are otherwise required is cause for revocation of the certification. (c) A certified nongovernmental electrical inspector may renew the certification for a 3–year term if the certificate holder: (1) otherwise is entitled to be certified; and (2) submits to the State Fire Marshal: (i) a renewal application on the form the State Fire Marshal provides; (ii) a renewal fee of $50; and (iii) satisfactory evidence of compliance with any other requirements under this section for renewal of certification. (d) Certificate holders who fail to renew within 90 days from the date of expiration shall be required to submit an initial application and successfully pass the written examination. (e) The State Fire Marshal shall renew the certification of each applicant who meets the requirements of this section.